Patent GB-535423-A (GB)
Title: Improvements in and relating to ironing machines
IPC: D06F65/06
Filed: 1939-10-04
Abstract: 535,423. Ironing machines. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 4, 1939, No. 27211. Convention date, Oct. 4, 1938. [Class 138 (ii)] An ironing machine comprising a shoe operating against a roll has power driven mechanism for actuating the shoe towards and away from the roll, manually operable mechanism for releasing the pressure of the shoe against the roll, a control lever for the power mechanism and extending over the shoe, and connections between the control lever and the release mechanism whereby the latter may be operated independently of the power mechanism. Power is supplied by a motor 9, Fig. 2, driving a worm 22 gearing with a wheel 23 on a shaft 24, Fig. 5, mounted in the machine head 26 and carrying a pinion 28 with which an internal gear 57 in the roll 30 is engaged when the shoe is moved against the roll and depresses it together with its bearings 46, which are resiliently displaced by springs 56 on pins 53 extending transversely through the stationary supporting shaft 47. Displacement of the roll and consequently its drive may be arrested by inserting a block 59 between the bearing 46 and the shaft 47, such block being fixed on a bar 60 slidable on the shaft and operable by a handle thereon extending beyond the free end of the roll. The roll is constructed as described in Specification 468,203. The shoe 67, Fig. 9, is supported by toggles 76, 75 from a shaft 69 which is rocked by crank 102 and link 100 from a clutch 105 driven, through half revolutions for applying or withdrawing the shoe, by dogs movable in opposing radial slots in the clutch into or out of engagement with teeth 137 on the worm wheel and controlled by trip gear from the control lever 91 which is mounted on the shaft 69 carries an extension front rod 135 which prevents the operator approaching too closely to the heated shoe. The toggle levers are connected by a pin and slot and exert their pressure through a spring applied between them. The power driven oscillations imparted to the shaft 69 by the clutch 105 actuate the toggles 75, 76 for moving the shoe through a radial pin 87, Fig. 12, engaging a switch 86a in a hub 85 mounted between side flanges on the control lever 91, a pin 88 mounted in the toggle element 76 and extending through an arcuate slot in the lever 91 being screwed into the hub 85 to transmit the oscillation without moving the control lever. The pressure on the shoe may be released manually and the shoe raised, without interference with the power operation of the shaft 69, by depressing a knob 89 on the end of the pin 88 whereby, against the action of a spring 96, the hub 85 is pressed back so that the notch 86a is out of engagement with the driving pin 87, whereupon the shoe may be raised and another notch 86b in the hub engaged with the driving pin. This provision also permits of turning the shoe well back for cleaning and washing by means of the control lever owing to a tongue 99 on the control lever 91 being movable past a stop 98. The clutch 105 is controlled by movements of the control lever 91 acting through the tongue 99 on trip gear 133, 132, 126, 124 to control the movement of the clutch dogs against the action of radial springs urging them outwards to engage the face teeth on the driving wheel 23.